Laser governance process is short-sighted doctors by micro-layer cornea board system to produce a corneal flap, flap and then in the matrix of the excimer laser used in accordance with myopia, hyperopia and astigmatism degree accurate cutting. LASIK surgery on the cornea thickness of a requirement that not less than 450 microns. So naturally some partial thin cornea with a high degree of myopia and patients need corneal cutting more patients to choose PRK or LASEK, the total of these two surgical pain after the defect is slow and recovery time.
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